PROVINCETOWN – Megan Hilty immediately established a camaraderie with her audience Wednesday night by addressing a few things she knew most of those gathered were thinking. The first item that the funny, bubbly Broadway/TV star mentioned was “the baby elephant in the room.”

Turning sideways, she proved that she was, indeed, pregnant – eight months along, in fact. She later joked that she should call her current tour “Megan Hilty in a Series of Muu-muus and Sensible Shoes, or Is There a Doctor in the House?”

She addressed the second item with her opening song: an anthemic version in low-alto tones of “Let Me Be Your Star,” the signature tune from NBC's “Smash,” in which she starred as an actress vying for the lead in a Broadway musical about Marilyn Monroe.

The musical drama lasted two seasons, but steadily lost audience and critical luster. When applause greeted her mention of “Smash,” she said with mock surprise: “YOU were the ones watching! I knew I'd find you someday ... and here you are, all in one room!” For those fans, her second song was the show's “Crazy Dreams.”

In an unusual set-up, Hilty is performing four hour-or-so shows this week with blues guitarist/husband Brian Gallagher (whom she says she usually introduces as “the guy who did this to me,” pointing to her rounded stomach). ThenSaturday and Sunday, she will share the stage with host/accompanist Seth Rudetsky in an interview/concert format that the “Broadway @ The Art House” series has become known for. So Wednesday's opener was different from what weekend audiences will see.

It wouldn't be surprising if there was some crossover, though, because Hilty used her career as a set-up for Wednesday's program, talking first about winning, then losing,

the role of Audrey in “Little Shop of Horrors.” She took the chance now to sing

“Suddenly, Seymour,” with Gallagher doing a soft-rock version of the Seymour lines from that duet. Acknowledging show tunes aren't what you'd expect with guitar accompaniment, he later did a bluesy version of “Tomorrow” from “Annie,” and got Hilty to abandon Broadway for the blues with a yearning “You're Gonna Make Me Lonesome When You Go.”

A little bit of country came in with “Backwoods Barbie,” a song from Broadway's “9 to 5,” in which Hilty played the Dolly Parton secretary role from the film version. Hilty closed her show with classic Broadway, performing a sultry but comedic “Diamonds are a Girl's Best Friend” from her 2012 Encores presentation in New York City of “Gentlemen Prefer Blondes.”

Hilty's best-known Broadway role, though, is as a replacement Glinda in “Wicked,” a show she stayed with for more than four years on Broadway and in Los Angeles. And she readily acknowledged that it took “some real balls” for her to perform that character's best-known “Popular” – albeit in a faster-paced, breathier and ditzier version – when the original Glinda, Kristin Chenoweth, had sung it just three nights earlier at Provincetown Town Hall.

“But did she do it with a guitar and eight months pregnant?” Hilty quipped.

A running gag through Wednesday's concert was that Hilty was shilling for sales of her 2013 CD “for the child's education,” and from that album, she performed her sad-but-strong “Be a Man” about a romantic break-up, and then a slowed-down, poignant version of Don Henley's “The Heart of the Matter.”

The pregnancy also was the focus of the encore, when – in what they said had become a tradition on this tour – Hilty and Gallagher asked an audience member to videotape the crowd and song as Hilty crooned a lovely “Rainbow Connection” to her unborn daughter.

Then, after the applause, Hilty headed to the lobby to sign those CDs.